The waist part for unicorn gundam destroy mode papermodel. I had to re-design some parts a few times before came up with this release, to make it easier to build and come with fewer parts. Shoulder joint design work pretty good just like the way I have expected, in this release I design new joint, trying to apply two ball joints for the hips. I hope this design will works too and minimize additional joints for leg movements. Next primarly release will be optimus prime arm parts.